Corrosion on stainless steel
Corrosion on stainless steel
(OP)
Hey,
I Wonder how to deal with corrosion on stainless steel. Of course I mean other methods than electropolishing and pasivation.
I Wonder how to deal with corrosion on stainless steel. Of course I mean other methods than electropolishing and pasivation.





RE: Corrosion on stainless steel
RE: Corrosion on stainless steel
RE: Corrosion on stainless steel
What is the environment?
The first step is always chemical passivation. Before it goes into service and before there is any corrosion. Passivation will remove traces of Fe from the surface that came from tools and handling. Often rust staining is no more than these spots corroding, but they can serve as sites for pitting to initiate also.
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P.E. Metallurgy, Plymouth Tube
RE: Corrosion on stainless steel
Fluid - water and gas.
RE: Corrosion on stainless steel
RE: Corrosion on stainless steel
RE: Corrosion on stainless steel
Pitting inside, outside or both?
Regards
r6155
RE: Corrosion on stainless steel
They must be fully protected, and even then I would not be surprised by some superficial corrosion.
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P.E. Metallurgy, Plymouth Tube
RE: Corrosion on stainless steel
Passivation solves the problem partly but i'm searching for other methods.
RE: Corrosion on stainless steel
RE: Corrosion on stainless steel
If so, you need to improve the processes taking care to prevent the contamination. Segregate the work. Use only new or segregated grinding wheels, wire brushes, drill bits etc. Cover plate rolls, forming tools, jigs, etc. with carpet, or use stainless tooling, and so forth. Then pickle and passivate.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Corrosion on stainless steel
Be careful with the quality of water during hydraulic test.
Your pressure vessel was inspected inside prior shiping ?
Regards
r6155